Review on HerMia Hanging Garbage Waterproof Travelling by Mike Ken

I've been using this garbage bag in my car for about two months now and first used the bags that came with it, but when you roll down the windows the bag makes a loud bang. The bag is also too big for the bag and things fly out with the window down. I haven't used the bag since and it's gotten a lot better: no noise, everything stays in and everything falls out when I go to the bin. It's not as big as I like as I have a Prius and there isn't much room left in there lol and I don't pour liquid or anything so can't tell how tight it is but if I had it guessing wouldn't be much of a problem due to the nature of the insulation inside.